The following counties of origin are taken from the ''Adjutant General's Report'', found on the [http://civilwar.ilgenweb.net/reg_html/index.html Illinois Civil War Rosters] web site. Roster pages are from the same report found on the [http://www.archive.org/stream/reportofadjutant07illi1#page/n6/mode/1up Internet Archives] web site. The rosters show the men who served in each regiment, their residences, dates of enlistment and mustering out, and other remarks.

The following counties of origin are taken from the ''Adjutant General's Report'', found on the [http://civilwar.ilgenweb.net/reg_html/index.html Illinois Civil War Rosters] web site. Roster pages are from the same report found on the [http://www.archive.org/stream/reportofadjutant07illi1#page/n6/mode/1up Internet Archives] web site. The rosters show the men who served in each regiment, their residences, dates of enlistment and mustering out, and other remarks.

Company B - many men from [[Gallatin_County,_Illinois|Gallatin County]] (Also Known as Gallatin County Cavalry) - [http://civilwar.ilgenweb.net/county/gallatin.html Gallatin County ]web site - [http://www.archive.org/stream/reportofadjutant07illi1#page/482/mode/1up Roster], vol. 7, pages 465-467.<br>

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Company B - many men from [[Gallatin County, Illinois|Gallatin County]] (Also Known as Gallatin County Cavalry) - [http://civilwar.ilgenweb.net/county/gallatin.html Gallatin County ]web site - [http://www.archive.org/stream/reportofadjutant07illi1#page/482/mode/1up Roster], vol. 7, pages 465-467.<br>

Company H - many men from many men from Marion and Grundy counties (Also Known as Centralia Cavalry) - [http://civilwar.ilgenweb.net/county/marion.html Marion] and [http://civilwar.ilgenweb.net/county/grundy.html Grundy] county web sites - [http://www.archive.org/stream/reportofadjutant07illi1#page/478/mode/1up Roster], vol. 7, pages 478-480.

Company H - many men from many men from Marion and Grundy counties (Also Known as Centralia Cavalry) - [http://civilwar.ilgenweb.net/county/marion.html Marion] and [http://civilwar.ilgenweb.net/county/grundy.html Grundy] county web sites - [http://www.archive.org/stream/reportofadjutant07illi1#page/478/mode/1up Roster], vol. 7, pages 478-480.

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Company I - many men from White County (Also Known as White County Cavalry) - [http://civilwar.ilgenweb.net/county/white.html White County] web site - [http://www.archive.org/stream/reportofadjutant07illi1#page/480/mode/1up Roster], vol. 7, pages 480-482<br>

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Company I - many men from White County (Also Known as White County Cavalry) - [http://civilwar.ilgenweb.net/county/white.html White County] web site - [http://www.archive.org/stream/reportofadjutant07illi1#page/480/mode/1up Roster], vol. 7, pages 480-482<br>

The [http://www.nps.gov/civilwar/soldiers-and-sailors-database.htm Civil War Soldiers and Sailors database] lists 1,854 men on its roster for this unit. [http://www.nps.gov/civilwar/search-soldiers.htm?submitted=1&SDunitCode=UIL0001RC Roster].

Companies in this Regiment with the Counties of Origin

Men often enlisted in a company recruited in the counties where they lived though not always. After many battles, companies might be combined because so many men were killed or wounded. However if you are unsure which company your ancestor was in, try the company recruited in his county first.

Seven Companies, "A" to "G," organized at Alton, Madison County, Illinois, and mustered in July 3, 1861.Company "H" was organized at Alton, Madison County, Illinois, June 12, 1861.Company "I" organized at Alton, Madison County, Illinois, July 9, 1861.Company "K" organized at Alton, Madison County, Illinois, December 9, 1861. Men often enlisted in a company recruited in the counties where they lived.

The following counties of origin are taken from the Adjutant General's Report, found on the Illinois Civil War Rosters web site. Roster pages are from the same report found on the Internet Archives web site. The rosters show the men who served in each regiment, their residences, dates of enlistment and mustering out, and other remarks.

Beginning United States Civil War Research gives steps for finding information about a Civil War soldier. It covers the major records that should be used. Additional records are described in ‘Illinois in the Civil War’ and ‘United States Civil War, 1861 to 1865’ (see below).

National Park Service, The Civil War Soldiers and Sailors System, is searchable by soldier's name and state. It contains basic facts about soldiers on both sides of the Civil War, a list of regiments, descriptions of significant battles, sources of the information, and suggestions for where to find additional information.

Illinois in the Civil War describes many Confederate and Union sources, specifically for Illinois, and how to find them.. These include compiled service records, pension records, rosters, cemetery records, Internet databases, published books, etc.

United States Civil War, 1861 to 1865 describes and explains United States and Confederate States records, rather than state records, and how to find them. These include veterans’ censuses, compiled service records, pension records, rosters, cemetery records, Internet databases, published books, etc.